Rail-expansion sound deadener



July 22, 1930'. 'H. w. HERBST 1,771,078

' RAIL EXPANSION SOUND DEQDENER Filed Jan. 6, 1926 Patented July 22, 1930 UNITED STATES PATENT, OFFICE Emmy w. nmmsr, or CHICAGO, ILLINOIS, ASSIGNOR, BY MES'NE ASSIGNMENTS, 'ro K THE PHILIP cAnEY MANUFACTURING COMPANY, A CORPORATION or 01110 RAIL-EXPANSION SOUND DEADENER I Application filed January My invention relates to a preformed, prepared strip of bituminous material, made to conform to the outline of the rail, and so arranged that it ties in or looks parts at various points, compacting the units against the rail,

completely surrounding all sides of the rail, except the top, so that the rail is. completely separated from the hard paving material surrounding it with an insulation. material,

which also acts as an expansion joint, thus deadening the impact of the car upon the rail.

pansi'on joint sound deadeneris composed is preferably that of a mixture of bituminous materialand ground corn cobs, or it may consist of bituminous material, ground corn cobs and finally divided fibre, or it may consist of bituminous material and web strengthening material consisting of elongated flat fibrous material, such as pieces of felt, paper, wood pulp, ribbon excelsior, flat wide grasses reed, or vegetation which is strong and conslsts of elongated fibrous material; or 1 t may consist of clay treated ,with .oil and mixed with the a above described filler, or clay mixed with a ductile and oily substance, such as clay, suitable mineral oil, resin, and rubber compounds,

mixed with the above described fibrous mate,- rials. I U

Ido not wish to be limited to the composition of matter utilized as a binder, when mixed with any of the above described forma tions, in so far as they are new, when adapted for expansion joint and'sound deadener for rails. Ground corn cobs are preferred,,or granulated cork particles may be used, and these materials will be more suitable when considering the insulation value as against the expansion value. 7

The units herein described may be extruded with a suitable extrusion machine, cast in moulds or rolled to form, as the case maybe.

The invention is best understood by referring to the accompanying drawing in which 6, 1926. Serial No. 79,543. I J

the construction of the material is illustrated and in which Figure 1 is a perspective view illustrating the application of the insulating material to a rail; Figure 2 is a perspective view of the sections of the material in spaced relation to the position they assume when assembled around the rail; Figure 3 is a view in cross section of the sections as assembled. around the rail and illustrating a slightly modified form of the invention.

In Fig. 1, -a represents the rail, bb the upper rail units, cc the lower rail units, and d the base unit. X It can readily be seen that the base portion 0cis readily standardized in shape and form, because the shape of the vase varies very little. The left hand unit -bof the upper rail section changes more than either of the lower rail sections c0-, and the right hand unit -b of the upper rail section changes many times, due to the variations in rail occurring on this side. The base section d is almost continuously standard. The sections ccin Fig; 1 are placed in position and the sections -bb pressed into position above the sections -0c-, locking the sections 00- in place. The base section is then placed in osition, completing the entire envelopment o the rail excepting the top face of the rail. A Figurej illustrates the units bb separated from the rail, -0c-- the standardized sections of the lower rail portion and d the fully standardized base portion.

Figure 3 illustrates the rail arsurrounded by the units -'bb- -cc and --al. in place, the lower rail portion cc-- being locked in position with the base portion dby staples ee-. This completely locks and envelopes the rail. In Fig. 3, f represents either cork or corn cob granules, grepresents finely divided fibrous matter and -h'- represents the bituminous material in whichthe fibrous material is incorporated.

The proportions ofground corn cob may run as high as. twenty-five (25 per cent or more, but (preferably twentyve. 25) per 1 cent groun corn cobs and seventyve 5) percentbituminous material; Likewise the cork granules may utilize the same formula. I"

If finely divided fibrous material is utilized a suitable formula would be twenty (20) per cent ground corn cobs, ten (10) per cent finely divided fibrous material and seventy per cent bituminous material or binding material, whatever the binder may be.

It can readily be understood that incorporation of the described fibrous material in ltuminous material would insulate any of the granite, concrete or brick paving over the rail, and the cellular structurewith the granules would take up the sound and prevent its transmission from the rail to the hard paving substances. The binder with the aid of the filler will also provide a suitable expansion joint material due to the compressible qualities of the bituminous or the like material,

and the resiliency of the fibrous matter mixed the sections b and 0 in one piece, and

this necessitated fabricating a greater volume of material into changeable sections.

A suitable formula for the bituminous material would be any blown bituminous material or any other type of bituminous material which would readily act as a binder, or the binder may consist of clay eighty (80) per cent, mineral oil twenty (20) per cent, or it may consist of clay seventy (70) per cent, resin ten (10) per cent and a suitable mineral oil twenty (20) per cent, or it may consist of sixty (60) per cent clay, ten (10) per cent resin, ten (10) per cent dissolved rubber and twenty (20) per cent suitable mineral .oil. Any of the described filling materials adding strength and acting as a tying means for the binder, may be utilized.

I have succeeded in eliminating projections, openings and extensions, which are readily deformable in packing, and thus I have devised a material which will shape better and be in better position to fit to the rail than previously.

The disclosure herein relating to the materails from which the rail filler or sections thereof are made, constitutes the sole invention of Albert C. Fischer, for which various divisional applications have'been filed.

I claim: j

1. An insulator for rails of the class described, comprising a plurality of preformed sections of sound deadening and expansion joint material, said sections comprising rail web enclosing members adapted to be disposed on opposite sides of the rail web with the top of said sections constructed to conform to the underside of the rail head, and a base section adapted to underlie the base of the rail and sections adapted to overlie the top of the base of the rail andprovide a support for said web sections.

2. An insulator for rails of the class described, comprising a plurality of preformed sections of sound deadening and expansion joint material, said sections comprising rail web enclosing members adapted to be disposed on opposite sides of the rail web with the top of said sections constructed to conform to the underside of the rail head, a base section underlying the base of the rail,

, sections adapted to overlie the top of the rail base and provide a support for said web sections, and means for anchoring the base section with the sections supporting the web sections. j

3. An insulator for rails of the class described, comprising a plurality of preformed sections of sound deadening and expansion joint material, said sections comprising rail web enclosing members adapted to be disposed on opposite sides of the rail web with the top of said sections constructed to conform to the underside of the rail head, a base section adapted to underlie the base of the rail, sections adapted to overlie the top of the rail base and provide a support for said web sections, and staples adapted to bridge the sections overlying the rail base and the section underlying the rail base.

4:..An insulator, sound deadener and expansion joint adapted to enclose and insulate that part of the rail exposed to contact of the road in which the rail is imbedded, comprising preformed, cooperative sections of duetile, waterproofing material. said sections being constructed and arranged to embrace opposite sides of the rail head and base of the rail, and the undersurface of the base of the ral 5. A sound deadening and expansion joint material for rails, comprising a plurality of preformed sections, some of said sections adapted to embrace the rail web and overlie the base of the rail and extend over the edge thereof, and a base section adapted to under lie the base of the rail in abutting relation to the sections overlying the top of the rail base substantially as and for the purpose de scribed.

6. Sound deadening and expansion joint material, for rails, comprising a plurality of preformed sections adapted to completely enclose and insulate that part of the rail exposed to contact with the road in which the rail is imbedded, some of said sections comprising rail web embracing members adapted to overlie the top of the rail base and having shoulders fitting around the edge of the rail lllO "BIS

base, and asection adapted to underlie-the rail base and abut against said shoulders.

7. A preformed sectional rail filler, comprising ductile, v(compressible waterproofing means constructed to embrace the we of the rail and overlie the base thereof, that portion of the filler overlying the rail base being gonstructed to overlap the edge of the rail ase. w '8. A preformed sectional rail filler, com-- prising ductile, compressible waterproofing means constructed to embrace the web of the rail and overlie the base thereof, that portion of the filler overlying the rail base being con--. M structed to overlap the edge of the rail base, and a separate sectional member adapted to underlie the rail base in contacting relation with the overlap on said portion that overlies the rail base. v v 9. A preformed sectional rail filler, comprising sound deadening and expansible sections of ductile waterproofing material, constructed to embrace the non-wearing portions of the rail. v 10. A system of track installation consisting of a rail, preformed blocks of vibration absorbing bituminous material conforming to the contour of portions of the rail, constructed and arranged to surround the rail onthree sides thereof, certain of the blocks being frictionally secured to the rail, and means for attaching the other block to those frictionally secured.

11. A system. of track installation consist- L ing of a rail, preformedblocks of vibration absorbing bituminous material conforming to the contour of the underside of the rail head and the side walls of the rail web and the upper face of the rail base, certain of said 4 blocks being constructedand arranged to interlock in assembled position with respect to said rail. 12. A system of track installation consisting of a rail, preformed blocks of vibration absorbing bituminous material conforming to the contour of the underside of the rail head, the side portions of .the rail web, the upper portions of the rail base, and the un erside of the rail base, certain of said blocks being constructed and arranged to be frictionally secured to the rail for holding them in assembled position.

Signed at Chicago, Illinois, this 31st day of December, 1925. 65 HENRY W. HERBST. 

